possible big problem on surf 1.2

[chemelec]

However Using a flat wound, 8 inch diameter Radial Coil measuring "180uH", about the best distance I can get with both my Gold Ring or a US Quarter is just 6 Inches.

I thought it should do better than that.

[chemelec]

On the Schematic, I just Corrected the Manufactures Name for the Audio Transformer.

[Mohamed Ghitas]

Hi Gary
could you just post the component placement pcb to help us putting the component in its right place
one more thing could you post your pcb with .LAY file
last question can i put the speaker probs direct to the PCB without using the transformer ?
i mean like this


thanks in advance

Mohamed Ghitas

[chemelec]

Hi Mohamad, If you are Not going to Build it EXACTIALLY AS SHOWN, Than DON'T Build it.

You can't just Modify things the way you want and still expect the Same Results.

Take care......Gary.

[Davor]

I've checked the transformer because TL026 calls for a TI amplifier, and it turns out to be 42TL026 by Xicon.
IMHO such transformers could be excelent for improving input noise, yet I did not try it in a lab yet.

[Mohamed Ghitas]

Hi Mohamad, If you are Not going to Build it EXACTIALLY AS SHOWN, Than DON'T Build it.

You can't just Modify things the way you want and still expect the Same Results.

Take care......Gary.

Okay
but as i understood you are using this transformer for the speakers
in fact iam going to remove the speakers and replace it with led
because iam using this detector in making a robot that could discover metals underground and i just need signal i don't need sound
if it possible to replace it with led ok please tell m how
if not iam so sad to not trying this perfect detector

[WM6]

You are using to make robotic detector and at the same time you do not know how to make simle LED mod?

I deeply support your optimistic approach.

[chemelec]

Okay
but as i understood you are using this transformer for the speakers
in fact iam going to remove the speakers and replace it with led
because iam using this detector in making a robot that could discover metals underground and i just need signal i don't need sound
if it possible to replace it with led ok please tell m how
if not iam so sad to not trying this perfect detector

LED?
Than Why did you put the Speaker in place of the Transformer?

[kt315]

try without the transformer. it is not so batt power economely, but you have volume control too and no noised.

[Mohamed Ghitas]

You are using to make robotic detector and at the same time you do not know how to make simle LED mod?

I deeply support your optimistic approach.

dont worry bro iam already knows how to turn it into led or other thing but he insist that i must made it with the transformer
so i asked him to make it with led to show me his idea about the importance of transformer

LED?
Than Why did you put the Speaker in place of the Transformer?

iam not using this detector with my own ears iam going to make robot that detect the metals underground to be more clearly that could detect mines underground
so i wont use neither led or speaker but iam just going to take the signal into another device called "Microcontroler"



any way i made another one but it also didnt work

iam supplying my circuit with computer power supply and when i plug power the MD gives discontinues
this discontinuous beeb stops when i touch the power supply metal body and the circuit works fine
but with very low sensitivity so i gues the problem goes with GND connections

i fixed it many times and its absolute correct

any idea ??

[chemelec]

dont worry bro iam already knows how to turn it into led or other thing but he insist that i must made it with the transformer
so i asked him to make it with led to show me his idea about the importance of transformer





iam not using this detector with my own ears iam going to make robot that detect the metals underground to be more clearly that could detect mines underground
so i wont use neither led or speaker but iam just going to take the signal into another device called "Microcontroler"



any way i made another one but it also didnt work
[ATTACH]26627[/ATTACH]

iam supplying my circuit with computer power supply and when i plug power the MD gives discontinues
this discontinuous beeb stops when i touch the power supply metal body and the circuit works fine
but with very low sensitivity so i gues the problem goes with GND connections

i fixed it many times and its absolute correct

any idea ??

The Transformer is only Required for a Speaker.
A Speaker is Low Impedance, so Yes it will NOT beBatt Power Economy

If Connecting this to a Microprocessor, I Doubt you even Need the MPSA13 transistor.
Remove that transistor and take off your signal at the Transistors Base connection to your microprocessor.

But I also have some doubts that Either of these signals are good for a Microprocessor.
You Might need to convert it into a Digital Logic.

[Mohamed Ghitas]

The Transformer is only Required for a Speaker.
A Speaker is Low Impedance, so Yes it will NOT beBatt Power Economy

If Connecting this to a Microprocessor, I Doubt you even Need the MPSA13 transistor.
Remove that transistor and take off your signal at the Transistors Base connection to your microprocessor.

But I also have some doubts that Either of these signals are good for a Microprocessor.
You Might need to convert it into a Digital Logic.

You are right so i was intending to seek the source of signal before MPSA13
and for turning it into logic iam intending in using op/amp as comparator and take the output signal to the micro direct

thanks

[black_cat]

Ok.....

I will send a Surf PI Longboard to your PM inbox

Nezocas
Could you please send me the PCB Surf PI 1.2 Longboard to your PM inbox